* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 动态背景 */
@keyframes move {
    100% {
        transform: translate3d(0, 0, 1px) rotate(360deg);
    }
}

.background {
    position: fixed;
    width: 100vw;
    height: 100vh;
    top: 0;
    left: 0;
    background: #3E1E68;
    overflow: hidden;
}

.background span {
    width: 20vmin;
    height: 20vmin;
    border-radius: 20vmin;
    backface-visibility: hidden;
    position: absolute;
    animation: move;
    animation-duration: 45;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}


.background span:nth-child(0) {
    color: #FFACAC;
    top: 90%;
    left: 47%;
    animation-duration: 8s;
    animation-delay: -17s;
    transform-origin: 2vw 17vh;
    box-shadow: -40vmin 0 5.494502440636581vmin currentColor;
}

.background span:nth-child(1) {
    color: #FFACAC;
    top: 31%;
    left: 5%;
    animation-duration: 40s;
    animation-delay: -14s;
    transform-origin: -5vw -14vh;
    box-shadow: -40vmin 0 5.192195104974926vmin currentColor;
}

.background span:nth-child(2) {
    color: #FFACAC;
    top: 18%;
    left: 62%;
    animation-duration: 20s;
    animation-delay: -5s;
    transform-origin: -18vw -12vh;
    box-shadow: 40vmin 0 5.72205756381233vmin currentColor;
}

.background span:nth-child(3) {
    color: #FFACAC;
    top: 71%;
    left: 45%;
    animation-duration: 30s;
    animation-delay: -2s;
    transform-origin: -4vw -20vh;
    box-shadow: -40vmin 0 5.303503038071778vmin currentColor;
}

.background span:nth-child(4) {
    color: #E45A84;
    top: 90%;
    left: 38%;
    animation-duration: 15s;
    animation-delay: -48s;
    transform-origin: 7vw -9vh;
    box-shadow: -40vmin 0 5.882238754040052vmin currentColor;
}

.background span:nth-child(5) {
    color: #583C87;
    top: 34%;
    left: 32%;
    animation-duration: 30s;
    animation-delay: -36s;
    transform-origin: -6vw -15vh;
    box-shadow: 40vmin 0 5.183333217256063vmin currentColor;
}

.background span:nth-child(6) {
    color: #583C87;
    top: 25%;
    left: 41%;
    animation-duration: 21s;
    animation-delay: -47s;
    transform-origin: -10vw -5vh;
    box-shadow: 40vmin 0 5.345257098222438vmin currentColor;
}

.background span:nth-child(7) {
    color: #E45A84;
    top: 16%;
    left: 39%;
    animation-duration: 30s;
    animation-delay: -33s;
    transform-origin: -15vw 3vh;
    box-shadow: -40vmin 0 5.693872337330205vmin currentColor;
}

.background span:nth-child(8) {
    color: #583C87;
    top: 42%;
    left: 55%;
    animation-duration: 46s;
    animation-delay: -50s;
    transform-origin: -6vw 25vh;
    box-shadow: 40vmin 0 5.588315610213253vmin currentColor;
}

.background span:nth-child(9) {
    color: #E45A84;
    top: 78%;
    left: 25%;
    animation-duration: 44s;
    animation-delay: -21s;
    transform-origin: -4vw -12vh;
    box-shadow: -40vmin 0 5.82170170819547vmin currentColor;
}

.background span:nth-child(10) {
    color: #E45A84;
    top: 73%;
    left: 77%;
    animation-duration: 41s;
    animation-delay: -40s;
    transform-origin: 21vw -11vh;
    box-shadow: -40vmin 0 5.838449416658446vmin currentColor;
}

.background span:nth-child(11) {
    color: #E45A84;
    top: 48%;
    left: 81%;
    animation-duration: 33s;
    animation-delay: -42s;
    transform-origin: 6vw 19vh;
    box-shadow: 40vmin 0 5.848850560573668vmin currentColor;
}

.background span:nth-child(12) {
    color: #E45A84;
    top: 77%;
    left: 7%;
    animation-duration: 25s;
    animation-delay: -1s;
    transform-origin: 15vw 24vh;
    box-shadow: -40vmin 0 5.800039290361969vmin currentColor;
}

.background span:nth-child(13) {
    color: #E45A84;
    top: 77%;
    left: 38%;
    animation-duration: 51s;
    animation-delay: -40s;
    transform-origin: -1vw -13vh;
    box-shadow: -40vmin 0 5.876822672246133vmin currentColor;
}

.background span:nth-child(14) {
    color: #583C87;
    top: 58%;
    left: 98%;
    animation-duration: 7s;
    animation-delay: -1s;
    transform-origin: -19vw -20vh;
    box-shadow: -40vmin 0 5.622075629639948vmin currentColor;
}

.background span:nth-child(15) {
    color: #583C87;
    top: 79%;
    left: 31%;
    animation-duration: 39s;
    animation-delay: -46s;
    transform-origin: 14vw 21vh;
    box-shadow: 40vmin 0 5.022352355698978vmin currentColor;
}

.background span:nth-child(16) {
    color: #E45A84;
    top: 41%;
    left: 74%;
    animation-duration: 37s;
    animation-delay: -4s;
    transform-origin: -19vw 3vh;
    box-shadow: 40vmin 0 5.049960684696969vmin currentColor;
}

.background span:nth-child(17) {
    color: #583C87;
    top: 56%;
    left: 34%;
    animation-duration: 26s;
    animation-delay: -35s;
    transform-origin: -16vw -7vh;
    box-shadow: -40vmin 0 5.11253385954465vmin currentColor;
}

.background span:nth-child(18) {
    color: #583C87;
    top: 84%;
    left: 2%;
    animation-duration: 14s;
    animation-delay: -39s;
    transform-origin: -10vw -6vh;
    box-shadow: 40vmin 0 5.903761483531039vmin currentColor;
}

.background span:nth-child(19) {
    color: #E45A84;
    top: 61%;
    left: 39%;
    animation-duration: 21s;
    animation-delay: -36s;
    transform-origin: 14vw 9vh;
    box-shadow: 40vmin 0 5.448311817969409vmin currentColor;
}

.background span:nth-child(20) {
    color: #E45A84;
    top: 33%;
    left: 5%;
    animation-duration: 8s;
    animation-delay: -7s;
    transform-origin: 4vw 2vh;
    box-shadow: 40vmin 0 5.013421190075091vmin currentColor;
}

/* 动态背景 */

body {
    height: 100vh;
    background-color: aquamarine;
}

.Box {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    background-color: rgba(0, 0, 0, 0.24);
    border-radius: 6px;
    padding: 20px 32px;
}

h3 {
    font-size: 22px;
    color: #fff;
    text-align: center;
    margin-bottom: 40px;
    font-weight: 500;
    letter-spacing: 5px;
}

input {
    width: 100%;
    height: 35px;
    border: 1px solid #fff;
    background-color: transparent;
    padding-left: 10px;
    font-size: 12px;
    color: #fff;
    margin-bottom: 20px;
    outline: none;
    border-radius: 5px;
}

input::placeholder {
    color: #fff;
}

.yzmBox {
    display: flex;
    justify-content: flex-start;
}

.yzmBox input {
    width: 70%;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.yzmBox .btn {
    cursor: pointer;
    width: 29%;
    background-color: #aa55ff;
    color: #d8d8d8;
    height: 35px;
    outline: none;
    border: 1px solid #aa55ff;
    font-size: 12px;
    border-radius: 6px;
    margin-left: 1%;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.forgetPwd {
    text-align: end;
    font-size: 12px;
    color: #ffffff;
    padding-right: 5px;
}

.loginBtn {
    width: 100%;
    line-height: 36px;
    text-align: center;
    font-size: 15px;
    color: #fff;
    border-radius: 6px;
    background: linear-gradient(to right, #aa55ff, #E45A84);
    outline: none;
    border: none;
    margin-top: 30px;
}

.no {
    margin-top: 30px;
    text-align: center;
    font-size: 12px;
    color: #ffffff;
}